Description
drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.14.12-1 | — |
| Debian 13 | linux | 4.14.12-1 | — |
| Debian 12 | linux | 4.14.12-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-119.143 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1054.63 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1013.13~16.04.2 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1014.14~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-24.26~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1020.25 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1086.94 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1088.93 | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-164.214 | USN-3849-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1016.16 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-119.143~14.04.1 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +14 | 4.14.0-115.7.1.el7a | RHSA-2019:0831 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | kernel-azure +2 | 4.12.14-5.16.1 | SUSE-SU-2018:3961-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-25.25.1 | SUSE-SU-2018:3589-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.3.1 | SUSE-SU-2018:3934-1 |
| SLES 12 SP4 | kernel-docs +3 | 4.12.14-95.3.1 | SUSE-SU-2018:4069-1 |
| SLES 12 SP4 | kernel-obs-build | 4.12.14-95.3.2 | SUSE-SU-2018:4069-1 |
| SLES 12 SP3 | kernel-azure | 4.4.162-4.19.2 | SUSE-SU-2019:0095-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.162-94.69.2 | SUSE-SU-2018:3689-1 |
| SLES 12 SP3 | kernel-syms-azure +1 | 4.4.162-4.19.1 | SUSE-SU-2019:0095-1 |
| SLES 12 SP3 | lttng-modules | 2.7.1-8.6.1 | SUSE-SU-2018:3689-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.101.1 | SUSE-SU-2019:0439-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_15 | 12-2.1 | SUSE-SU-2018:3787-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_16 +1 | 11-2.1 | SUSE-SU-2018:3787-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_27 | 1-3.3.1 | SUSE-SU-2019:0439-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.110.1 | SUSE-SU-2019:1289-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_23 | 10-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_24 +2 | 9-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_27 | 7-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_28 +1 | 6-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_30 | 5-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_31 +1 | 3-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_33 | 1-2.3.1 | SUSE-SU-2019:1289-1 |
| SLES 12 SP1 | lttng-modules | 2.7.0-4.4.1 | SUSE-SU-2019:1289-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | kernel-ec2 | 3.12.74-60.64.110.1 | SUSE-SU-2019:1289-1 |
| SLES 12 | kgraft-patch-SLE12_Update_29 | 11-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 | kgraft-patch-SLE12_Update_30 +2 | 10-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 | kgraft-patch-SLE12_Update_33 | 9-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 | kgraft-patch-SLE12_Update_34 | 7-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 | kgraft-patch-SLE12_Update_35 +1 | 6-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 | kgraft-patch-SLE12_Update_37 | 5-2.1 | SUSE-SU-2018:3772-1 |
| SLES 12 | kgraft-patch-SLE12_Update_38 | 3-2.1 | SUSE-SU-2018:3772-1 |
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.81.1 | SUSE-SU-2018:3746-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.59.1 | SUSE-SU-2019:13937-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.3.1 | SUSE-SU-2018:3934-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.3.1 | SUSE-SU-2018:4069-1 |
| SLES for SAP 12 SP3 | kernel-azure | 4.4.162-4.19.2 | SUSE-SU-2019:0095-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.162-94.69.2 | SUSE-SU-2018:3689-1 |
| SLES for SAP 12 SP3 | kernel-syms-azure +1 | 4.4.162-4.19.1 | SUSE-SU-2019:0095-1 |
| SLES for SAP 12 SP3 | lttng-modules | 2.7.1-8.6.1 | SUSE-SU-2018:3689-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.101.1 | SUSE-SU-2019:0439-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_15 | 12-2.1 | SUSE-SU-2018:3787-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_16 +1 | 11-2.1 | SUSE-SU-2018:3787-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_27 | 1-3.3.1 | SUSE-SU-2019:0439-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.110.1 | SUSE-SU-2019:1289-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_33 | 1-2.3.1 | SUSE-SU-2019:1289-1 |
| SLES for SAP 12 SP1 | lttng-modules | 2.7.0-4.4.1 | SUSE-SU-2019:1289-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.81.1 | SUSE-SU-2018:3746-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.162-3.26.1 | SUSE-SU-2018:3773-1, SUSE-SU-2018:3659-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.39.1 | SUSE-SU-2018:3869-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-25.25.1 | SUSE-SU-2018:3593-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_0 | 6-16.2 | SUSE-SU-2018:3880-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_7 | 1-1.3.1 | SUSE-SU-2018:3593-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_1 | 1-7.1 | SUSE-SU-2018:4072-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_21 | 1-4.5.2 | SUSE-SU-2018:3688-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_5 +2 | 11-2.1 | SUSE-SU-2018:3865-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.101.1 | SUSE-SU-2019:0439-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_27 | 1-3.3.1 | SUSE-SU-2019:0439-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.59.1 | SUSE-SU-2019:13937-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.101.1 | SUSE-SU-2019:0439-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_27 | 1-3.3.1 | SUSE-SU-2019:0439-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.23.2.el7uek | ELSA-2018-4307 |
Advisories 23
- RHSA-2019:0831 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3849-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2018:3593-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3880-1 Security update for the Linux Kernel (Live Patch 0 for SLE 15) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1289-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3659-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3688-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3689-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3589-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3865-1 Security update for the Linux Kernel (Live Patch 5 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3961-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4072-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3934-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3746-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3772-1 Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP1) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3787-1 Security update for the Linux Kernel (Live Patch 15 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0439-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:3773-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2019:0095-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:4069-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:3869-1 Security update for the Linux RT Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2019:13937-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2018-4307 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 11, 2018
References
- USN-3849-1 vendor-advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1094825
- USN-3849-2 vendor-advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
- https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f056348
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348
- RHSA-2019:0831 vendor-advisory